linux-kernel - [PATCH 1/5] driver core: class: mark class

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Date:   Sun,  2 Apr 2023 19:58:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     rafael@...nel.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 1/5] driver core: class: mark class_release() as taking a const *

The struct class callback, class_release(), is only called in 2 places,
the pcmcia cardservices code, and in the class driver core code.  Both
places it is safe to mark the structure as a const *, to allow us to
in the future mark all struct class usages as constant and move into
read-only memory.

Cc: "Rafael J. Wysocki" <rafael@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/base/class.c         | 2 +-
 drivers/pcmcia/cs.c          | 2 +-
 include/linux/device/class.h | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/base/class.c b/drivers/base/class.c
index 65502bd7d5c5..53fc7052340c 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -235,7 +235,7 @@ void class_unregister(const struct class *cls)
 }
 EXPORT_SYMBOL_GPL(class_unregister);
 
-static void class_create_release(struct class *cls)
+static void class_create_release(const struct class *cls)
 {
 	pr_debug("%s called for %s\n", __func__, cls->name);
 	kfree(cls);
diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index e3224e49c43f..5658745c398f 100644
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -824,7 +824,7 @@ static int pcmcia_socket_uevent(const struct device *dev,
 
 static struct completion pcmcia_unload;
 
-static void pcmcia_release_socket_class(struct class *data)
+static void pcmcia_release_socket_class(const struct class *data)
 {
 	complete(&pcmcia_unload);
 }
diff --git a/include/linux/device/class.h b/include/linux/device/class.h
index 7e4a1a6329f4..f3c418fa129a 100644
--- a/include/linux/device/class.h
+++ b/include/linux/device/class.h
@@ -58,7 +58,7 @@ struct class {
 	int (*dev_uevent)(const struct device *dev, struct kobj_uevent_env *env);
 	char *(*devnode)(const struct device *dev, umode_t *mode);
 
-	void (*class_release)(struct class *class);
+	void (*class_release)(const struct class *class);
 	void (*dev_release)(struct device *dev);
 
 	int (*shutdown_pre)(struct device *dev);
-- 
2.40.0